2023 TOYOTA MIRAI Owners Manual

5059-1. Specifications
Owners Manual_USA_M62064_en
9
Vehicle specifications
tration of the U.S. Department of
Transportation.
It provides the purchasers
and/or prospective purchasers
of Toyota vehicles with informa-
tion on uniform tire quality grad-
ing.
Your Toyota dealer will help answer
any questions you may have as you
read this information.
■DOT quality grades
All passenger vehicle tires must
conform to Federal Safety
Requirements in addition to
these grades. Quality grades
can be found where applicable
on the tire sidewall between
tread shoulder and maximum
section width.
For example: Treadwear 200 Trac-
tion AA Temperature A
■Treadwear
The treadwear grade is a com-
parative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course.
For example, a tire graded 150
would wear one and a half (1 - 1/2)
times as well on the government
course as a tire graded 100.
The relative perfo rmance of tires
depends upon the actual conditions
of their use. Performance may differ
significantly from the norm due to
variations in driving habits, service
practices and differences in road
characteristics and climate.
■Traction AA, A, B, C
The traction grades, from high-
est to lowest, are AA, A, B and
C, and they represent the tire’s
ability to stop on wet pavement
as measured under controlled
conditions on specified govern-
ment test surfaces of asphalt
and concrete.
A tire marked C may have poor
traction performance.
Warning: The traction grade
assigned to this tire is based on
braking (straight ahead) traction
tests and does not include corner-
ing (turning) traction.
■Temperature A, B, C
The temperature grades are A
(the highest), B, and C, repre-
senting the tire’s resistance to
the generation of heat and its
ability to dissipate heat when
tested under controlled condi-
tions on a specified indoor labo-
ratory test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure.
Grade C corresponds to a level of
performance which all passenger
car tires must meet under the Fed-
eral Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher
levels of performance on the labo-
ratory test wheel than the minimum
required by law.

5069-1. Specifications
Owners Manual_USA_M62064_enWarning: The temperature grades
of a tire assume that it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than
1 mile or 1.5 km
under that condition
Maximum inflation pressure
The maximum cold inf lated pressure to
which a tire may be inflated, shown on the
sidewall of the tire
Recommended inflation pres-
sureCold tire inflation pressure recommended
by a manufacturer
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
transmission, power steering, power
brakes, power windows, power seats,
radio and heater, to the extent that these
items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a moto r vehicle with stan-
dard equipment, including the maximum
capacity of fuel, oil and coolant, and if so
equipped, air conditioning and additional
weight optional engine
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occu-
pants specified in the second column of
Ta b l e 1
* that follows

5079-1. Specifications
Owners Manual_USA_M62064_en
9
Vehicle specifications
Occupant distribution
Distribution of occupants in a vehicle as
specified in the third column of Table 1
*
below
Production options weight
The combined weight of installed regular
production options weighing over 5 lb. (2.3
kg) in excess of the standard items which
they replace, not previously considered in
curb weight or accessory weight, including
heavy duty brakes, ride levelers, roof rack,
heavy duty 12-volt battery, and special trim
Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated
Rim diameter (Wheel diame-
ter)Nominal diameter o f the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation
for a rim by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight (Total
load capacity)The rated cargo and luggage load plus 150
lb. (68 kg) times the vehicle’s designated
seating capacity
Vehicle maximum load on the
tire
The load on an individua l tire that is deter-
mined by distributing to each axle its share
of the maximum loaded vehicle weight,
and dividing by two
Vehicle normal load on the tire
The load on an individua l tire that is deter-
mined by distributing to each axle its share
of curb weight, accessory weight, and nor-
mal occupant weight (distributed in accor-
dance with Table 1
* below), and dividing by
two
Weather sideThe surface area of the rim not covered by
the inflated tire
Bead
The part of the tire that is made of steel
wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim
Tire related termMeaning

5089-1. Specifications
Owners Manual_USA_M62064_en
Bead separationA breakdown of the bond between compo-
nents in the bead
Bias ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at alternate
angles substantially less than 90 degrees
to the centerline of the tread
Carcass
The tire structure, except tread and side-
wall rubber which, when inflated, bears the
load
ChunkingThe breaking away of pieces of the tread
or sidewall
CordThe strands forming the plies in the tire
Cord separationThe parting of cords from adjacent rubber
compounds
Cracking
Any parting within the tread, sidewall, or
innerliner of the ti re extending to cord
material
CT
A pneumatic tire with an inverted flange
tire and rim system in which the rim is
designed with rim flanges pointed radially
inward and the tire is designed to fit on the
underside of the rim in a manner that
encloses the rim flanges inside the air cav-
ity of the tire
Extra load tire
A tire designed to operate at higher loads
and at higher inflation pressures than the
corresponding standard tire
GrooveThe space between two adjacent tread ribs
Innerliner
The layer(s) forming the inside surface of a
tubeless tire that contains the inflating
medium within the tire
Innerliner separationThe parting of the innerliner from cord
material in the carcass
Tire related termMeaning

5099-1. Specifications
Owners Manual_USA_M62064_en
9
Vehicle specifications
Intended outboard sidewall
(a) The sidewall that c ontains a whitewall,
bears white lettering , or bears manufac-
turer, brand, and/or model name molding
that is higher or deeper than the same
molding on the other s idewall of the tire, or
(b) The outward facing sidewall of an
asymmetrical tire that has a particular side
that must always face outward when
mounted on a vehicle
Light truck (LT) tire
A tire designated by its manufacturer as
primarily intended for use on lightweight
trucks or multipurpose passenger vehicles
Load ratingThe maximum load that a tire is rated to
carry for a given inflation pressure
Maximum load ratingThe load rating for a tire at the maximum
permissible inflation pressure for that tire
Maximum permissible inflation
pressureThe maximum cold inf lation pressure to
which a tire may be inflated
Measuring rimThe rim on which a tire is fitted for physical
dimension requirements
Open splice
Any parting at any junction of tread, side-
wall, or innerliner that extends to cord
material
Outer diameterThe overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors
of the sidewalls of an inflated tire, including
elevations due to labeling, decorations, or
protective bands or ribs
Passenger car tire
A tire intended for use on passenger cars,
multipurpose passenger vehicles, and
trucks, that have a gross vehicle weight
rating (GVWR) of 10,000 lb. or less.
PlyA layer of rubber-coated parallel cords
Ply separationA parting of rubber compound between
adjacent plies
Tire related termMeaning

5109-1. Specifications
Owners Manual_USA_M62064_en
Pneumatic tire
A mechanical device made of rubber,
chemicals, fabric and steel or other materi-
als, that, when mounted on an automotive
wheel, provides the tr action and contains
the gas or fluid that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at substan-
tially 90 degrees to the centerline of the
tread
Reinforced tire
A tire designed to operate at higher loads
and at higher inflation pressures than the
corresponding standard tire
Section width
The linear distance between the exteriors
of the sidewalls of an i nflated tire, exclud-
ing elevations due to labeling, decoration,
or protective bands
SidewallThat portion of a tire between the tread
and bead
Sidewall separationThe parting of the rubber compound from
the cord material in the sidewall
Snow tire
A tire that attains a t raction index equal to
or greater than 110, compared to the
ASTM E-1136 Standard Reference Test
Tire, when using the snow traction test as
described in ASTM F-1805-00, Standard
Test Method for Single Wheel Driving Trac-
tion in a Straight Line on Snow-and Ice-
Covered Surfaces, and which is marked
with an Alpine Symbol ( ) on at least
one sidewall
Test rim
The rim on which a tire is fitted for testing,
and may be any rim lis ted as appropriate
for use with that tire
TreadThat portion of a tire that comes into con-
tact with the road
Tire related termMeaning

5119-1. Specifications
Owners Manual_USA_M62064_en
9
Vehicle specifications
*: Table 1 -Occupant loading and di stribution for vehicle normal load for var-
ious designated seating capacities
Tread ribA tread section running circumferentially
around a tire
Tread separationPulling away of the tread from the tire car-
cass
Treadwear indicators (TWI)
The projections within the principal
grooves designed to give a visual indica-
tion of the degrees o f wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire
assembly securely during testing
Tire related termMeaning
Designated seating
capacity, Number of occupantsVehicle normal load,
Number of occupantsOccupant distribution in a normally loaded vehi- cle
2 through 422 in front
5 through 1032 in front, 1 in second
seat
11 through 155
2 in front, 1 in second
seat, 1 in third seat, 1 in fourth seat
16 through 207
2 in front, 2 in second
seat, 2 in third seat, 1 in fourth seat

5129-2. Customization
Owners Manual_USA_M62064_en
9-2.Customization
■Changing by using the
meter control switches
1 Press or to select .
2 Operate the meter control
switches to select the desired
item to be customized.
3 According to the display,
select the desired setting and
then press .
To go back to the previous screen
or exit the customize mode, press
.
■Changing by using the mul-
timedia system
1 Select on the main menu
screen. 2
Select “Vehicle customize”.
3 Select the item to change the
settings of from the list.
Various setting can be changed.
Refer to the list of settings that can
be changed for details.
Customizable features
Your vehicle includes a vari-
ety of electronic features
that can be personalized to
your preferences. The set-
tings of these features can
be changed by using the
multi-information display,
the multimedia system or at
your Toyota dealer.
Vehicles with Toyota Team-
mate Advanced Drive, refer to
“Toyota Teammate Advanced
Drive OWNER’S MANUAL”.
Customizing vehicle fea-
tures
NOTICE
■During customization
To prevent 12-volt battery dis-
charge, ensure that the fuel cell
system is operating while custom-
izing features.